接触快速固化型水基木材胶黏剂的研究 - 林中祥胶粘剂技术信息网

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接触快速固化型水基木材胶黏剂的研究 - 林中祥胶粘剂技术信息网

22, Vol. 30. No. 5, 2008, , (, 110168):PVOH,,,,, PVOH :PVOH4. 5% ,0. 8mol/L:;;: TQ 433. 433: A: 1001 - 0017 (2008) 05 - 0022 - 04Study on Contact Fast Curing W aterborne Adhesive forWoodWANG Gui - p ing, MU Rui and CAO Jian - guo( Shenyang L igong U niversity, Shenyang 110168, China)Abstract: Polyvinyl acetate emulsion with active group was p repared by emulsion polymerization with using PVOH as a p rotective colloid. And a kindof contact fast curing waterborne adhesive for wood was synthesized, in which component A was the polyvinyl acetate emulsion and component B containedmacromolecule polymer with hydrazide group, thus, the fast bonding for wood is achieved. The effects of the contents of PVOH and hydrazide group onperformance of the adhesive were studied. The results showed that the best p roportion for this adhesive were as follows, PVOH content was 4. 5% in com2ponent A and hydrazide group concentration was 0. 8mol/L in component B.Key words: Adhesive for wood; polyvinyl acetate; emulsion polymerization ,,, ,,,, [ 14 ] ( PVAC), ,,,,() , [57 ] ,, ( PVOH ),,,,, ,,,,, 11. 1(VAC) : ;( PVOH ) : ;OP - 10:;(DBP) (APS);:1. 21. 2. 1PVOH ,,: 2008 - 03 - 17:(1963 - ) ,,,,,:


2008305CHEM ISTRY AND ADHESION2390,,40,OP - 1010m in,VAC (10% )APS(40% ) ,,657045hVACAPS,90,1h50,DBP 1. 2. 2(),1. 31. 3. 1GB - 1725 - 79,3g(W 0 )(W 1 ),,105 5(W 2 ) ( S): S =(W 21. 3. 2- W 1 ) /W 0 100%(C)(S )(S ),:C = (S /S ) 100% = S / (W 3 /W 4 ) 100%W 3/g;W 4- - /g1. 3. 3NDJ - 1,251. 3. 4, ,100g/m 2 ,50g/m 2 ,,2030kN /m 2 ,,GB /T17517- 1998, (1) 10 s30 s60 s120 s , 5m in,,MPa,,(2)5m in,,,MPa,(3)5m in , ,303h,,,MPa, 22. 1PVOHPVOH ( PVA ) ,8% 12%,,PVA -1788,( PVAC), ,PVAC, ,,, 2. 1. 1PVOHPVOH,VAC,1PVOH1PVOHTable 1 The effect of PVOH content on apparentphysical p roperties of the emulsionPVOH/W , % /W , % /mPas /%33. 544. 555. 5647. 147. 246. 945. 545. 541. 040. 86550815097001210013500144001740097. 597. 496. 593. 393. 283. 683. 0,,,,,,,1,PVOH ,,,,,, PVOH 3%6% ,6550mPas17400mPas,97. 5%83% ,2. 1. 2PVOH2. 1. 2. 1PVOHPVOH,1. 2. 1


24, Vol. 30. No. 5, 2008PVAC,,1.2. 20. 8mol,,,1 1Fig. 1 The initial comp ression shear strength in different p ressing time:PVOH ,,PVOH 4. 5% ,PVOH, ,,,, ,,PVOH,, PVOH,,,,,,,,,,,,PVOH,, 1,PVOH,, 10 s120 s, ,,,,,,,,, 2. 1. 2. 2PVOHPVOH2,PVOH,4. 5%, , PVOH 4. 5%, ,, ,, 2PVOHTable 2 The final bonding strength of the samp leswith different PVOH contentsPVOH/W , % 3 3. 5 4 4. 5 5 5. 5 6/M Pa 7. 0 7. 2 7. 5 8. 5 8. 4 8. 4 8. 32. 1. 2. 3PVOH1. 3. 4PVOH,33PVOH3hTable 3 The bonding strength of the samp les withdifferent PVOH contents after soaking into water for 3hPVOH/W , % 3 3. 5 4 4. 5 5 5. 5 6/M Pa 1. 98 2. 43 2. 94 3. 06 2. 82 2. 13 2. 04,,,,,,3,PVOH,,,PVOH4. 5%,,,, PVOH ,PVOH,PVOH4. 5%,3h3MPa,,2. 2 ,, 4


2008305CHEM ISTRY AND ADHESION254Table 4 The mechanical p roperties of the adhesivewith different hydrazide group contents/molL - 1 (60 s) 0. 2 0. 4 0. 6 0. 8 1. 0 1. 2/M Pa/MPa/MPa0. 058. 062. 930. 0558. 523. 030. 0658. 913. 50. 089. 053. 560. 068. 883. 470. 058. 793. 4,,,,0. 8mol/L, 3 (1)PVOH ,,PVOH(2),,(3),PVOH4. 5% 0. 8mol/L ,(4),, :[ 1 ] ,. [ J ]. , 2004, (4) : 37.[ 2 ] ,,. [ J ]. , 2001, 15 (4) : 304308.[ 3 ] . [ J ]. , 2005, 26 ( 1) : 3841.[ 4 ] DONESCU D, FUSULAN L, PETCU C, et al. Copolymeriaztion ofvinyl acetate with acrylic monomers in m icro - emulsion [ J ]. Eur.polym. J. , 2001, 37 (7) : 1499 1505.[ 5 ] ,. [ J ]. , 2000, 11 (1) : 2224.[ 6 ] ,,. [ J ]. , 2004, 25 (3) : 3941.[ 7 ] . [ J ]. , 2003, (3) : 1620.(3)[ 2 ] L I YIJUN, WANG KUNL IN, W E I J INQUAN, et al. Imp rovingtensile p roperties of double - walled carbon nanotube strands by in2tercalation of epoxy resin. Carbon, 2006, 44: 176179.[ 3 ] ,,,. [ J ]. , 2006, 64 (3) : 203207.[ 4 ] ,, , . /[ J ]. , 2007, 65 ( 6) :525531.[ 5 ] ZHENG YAP ING, ZHANG A IBO, CHEN Q INGHUA, et al.Functionalized effect on carbon nanotube /epoxy nano - composites[ J ]. Materials Science and Engineering: A, 2006, 435 436:5/( TEM)3 Fig. 5 TEM of MWNTs/ epoxy nanocomposites,/ ,,,,:[ 1 ] . [M ]. : , 2002: 300310.145149.[ 6 ] . [M ]. : ,2001: 113.[ 7 ] L IAO YH, MAR IETTA - TOND IN O, L IANG Z, et al. Investiga2tion of the dispersion p rocessOf SWNTs/SC - 15 epoxy resin nano2composites[ J ]. Materials Science and Engineering A , 2004, 385(12) : 175181.[ 8 ] ,,,. [ J ]. , 2005, (2) : 3841.[ 9 ] , , . /[ J ]. , 2006, 22 (4) : 216218.[ 10 ] ,. [M ]. :, 2004:200210.[ 11 ] ,,,. ( )[ J ]. , 2004, 20 (2) : 133139.

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